std::negative_binomial_distribution<IntType>::negative_binomial_distribution

 

C++

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Feature test macros (C++20)

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ckd_add (C++26) ckd_sub (C++26)	ckd_mul (C++26)

 

Pseudo-random number generation

Uniform random bit generators   uniform_random_bit_generator (C++20) Random number engines linear_congruential_engine (C++11) mersenne_twister_engine (C++11) subtract_with_carry_engine (C++11) philox_engine (C++26) Random number engine adaptors discard_block_engine (C++11) independent_bits_engine (C++11) shuffle_order_engine (C++11) Predefined random number generators Non-deterministic random numbers random_device (C++11) Utilities generate_canonical (C++11) seed_seq (C++11) Random number algorithms ranges::generate_random (C++26) C random library rand    srand    RAND_MAX

Random number distributions Uniform distributions uniform_int_distribution (C++11) uniform_real_distribution (C++11) generate_canonical (C++11) Bernoulli distributions bernoulli_distribution (C++11) binomial_distribution (C++11) negative_binomial_distribution (C++11) geometric_distribution (C++11) Poisson distributions poisson_distribution (C++11) exponential_distribution (C++11) gamma_distribution (C++11) weibull_distribution (C++11) extreme_value_distribution (C++11) Normal distributions normal_distribution (C++11) lognormal_distribution (C++11) chi_squared_distribution (C++11) cauchy_distribution (C++11) fisher_f_distribution (C++11) student_t_distribution (C++11) Sampling distributions discrete_distribution (C++11) piecewise_constant_distribution (C++11) piecewise_linear_distribution (C++11)

 

std::negative_binomial_distribution

Member functions

negative_binomial_distribution::negative_binomial_distribution

negative_binomial_distribution::reset

Generation

negative_binomial_distribution::operator()

Characteristics

negative_binomial_distribution::pnegative_binomial_distribution::k

negative_binomial_distribution::param

negative_binomial_distribution::min

negative_binomial_distribution::max

Non-member functions

operator==operator!= (C++11)(C++11)(until C++20)

operator<<operator>> (C++11)(C++11)

 

negative_binomial_distribution() : negative_binomial_distribution(1) {}	(1)	(since C++11)
explicit negative_binomial_distribution( IntType k, double p = 0.5 );	(2)	(since C++11)
explicit negative_binomial_distribution( const param_type& params );	(3)	(since C++11)

Constructs a new distribution object.

2) Uses k and p as the distribution parameters.

3) Uses params as the distribution parameters.

Parameters

k	-	the k distribution parameter (number of trial successes)
p	-	the p distribution parameter (probability of a trial generating true)
params	-	the distribution parameter set

Notes

Requires that 0 < p ≤ 1 and 0 < k.

If p == 1, subsequent calls to the operator() overload that does not accept a param_type object will cause undefined behavior.

The default-constructed std::negative_binomial_distribution is equivalent to the default-constructed std::geometric_distribution.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
P0935R0	C++11	default constructor was explicit	made implicit

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